CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM

nutSpalartAllmaras(Standard)WallFunction implementations

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   January 13, 2012, 09:07
Default nutSpalartAllmaras(Standard)WallFunction implementations
  #1
Senior Member
 
Arne Stahlmann
Join Date: Nov 2009
Location: Hanover, Germany
Posts: 209
Rep Power: 8
Arnoldinho is on a distinguished road
Hi all,

I cannot get really familiar with the implementations of the Spalart Allmaras model for nut, which can be, as read from many posts, be seen as a continuous wall function for nut.

Basically, there are two versions available:
- nutSpalartAllmarasWallFunction
- nutSpalartAllmarasStandardWallFuntion

As far as I can see, they differ in the way U as the controlling variable is calculated; the latter version with a differentiation of yPlus/yPlusLam and the first one with a more complex calculation of Utau.

Can anyone explain the actual difference and the applications they have been thought for, esp. regarding continuous low- to high-re modeling?

Arne
Arnoldinho is offline   Reply With Quote

Old   January 16, 2012, 04:53
Default
  #2
Senior Member
 
BastiL
Join Date: Mar 2009
Posts: 471
Rep Power: 11
bastil is on a distinguished road
Quote:
Originally Posted by Arnoldinho View Post
Can anyone explain the actual difference and the applications they have been thought for, esp. regarding continuous low- to high-re modeling?
Arne, as far as I know the first one (nutSpalartAllmarasWallFunction) is designed to be the continuous low- to high-re wall funtion whereas the second one (nutSpalartAllmarasStandardWallFunction) is a Hi-Re formulation. Please correct me if I'm wrong.

Regards Bastian

Last edited by bastil; January 17, 2012 at 03:46.
bastil is offline   Reply With Quote

Old   January 17, 2012, 02:34
Default
  #3
Senior Member
 
Arne Stahlmann
Join Date: Nov 2009
Location: Hanover, Germany
Posts: 209
Rep Power: 8
Arnoldinho is on a distinguished road
Hi Bastil,

thanks for your answer. Unfortunately I cannot correct you in what you stated . I always used nutSpalartAllmaras (without 'standard') so I haven't yet checked the differences in results.

Arne
Arnoldinho is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Incompressible turbulence models: strange implementations? AleDR OpenFOAM 3 November 18, 2014 12:23
Wall functions and turbulence models implementations jposunz OpenFOAM Running, Solving & CFD 2 October 23, 2009 04:02
Compressible Turbulence Model Implementations shaun OpenFOAM Running, Solving & CFD 4 October 21, 2009 11:55


All times are GMT -4. The time now is 06:58.